/Engine/Plugins/Experimental/MeshModelingToolsetExp/Source/MeshModelingToolsExp/Public/MeshVertexPaintTool.h
This function is called provide set of available weight maps
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)() [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > GetWeightMapsFunc()